The module can be set to trigger on signals between -30 dBu and 0 dBu. The DELAY control sets the time required for the relay to release when the audio drops below the threshold.The delay adjustment range for the ST-ACR2 is from 5 seconds to 50 seconds.
Switching Controlled by Audio Signal
Sensing of Line-Level Signal
DPDT Switching Contacts
Open-Collector SLAVE Output
May be connected balanced or unbalanced
Control Output: Open-collector @ 25 mA suitable to drive indicators or slave LCR relay
Audio threshold LED (for setting sensitivity)
Max. Switching Power:
60 W, 125 VA
Max. Switching Voltage:
220 VDC, 250 VAC
Max. Switching Current:
Activation Response Time:
-30 dBu to 0 dBu (adjustable)
Relay Release Delay:
5 sec. to 50 sec. nominal (adjustable)
Ambient Operating Environment:
0° C to 55° C
GROUND-REFERENCED, 24 VDC @ 50 mA*
* Assumes 20 mA max load at SLAVE output
Height: 0.7" (1.7 cm), Width: 3" (7.6 cm), Depth: 1.6" (3.9 cm)
2" x 2" x 4"
MCM Part #: 555-ST-ACR2
Radio Design Labs Part #: ST-ACR2
Package Specifications & Dimensions
Weight: 0.23 lbs.
Warranty: 1095 days Need to Return?
Length: 4.25 in.
Width: 2.25 in.
Height: 2 in.
Extra Shipping Charge: No
Drop Ship: No